a.ownerDocument is undefined

[anonymous]

$('.delete').live('click', function()
{
	var id = $(this).parent().attr('data-id');
	
	$.ajax({
		url: 'include/post.php',
		type: 'POST',
		data: 'delete=' + id,
		success: function(data)
		{
			if(data == 'deleted')
			{
				$(this).slideUp('slow');
			}
		}
	});
});

Returns an error in FireBug:

a.ownerDocument is undefined (line 129)

Which stances to this line:

d.filter||"";d.filter=Ea.test(f)?f.replace(Ea,e):d.filter+" "+e}};if(t.defaultView&&t.defaultView.getComputedStyle)Ga=function(a,b,d){var e;d=d.replace(ib,"-$1").toLowerCase();if(!(b=a.ownerDocument.defaultView))return B;if(b=b.getComputedStyle(a,null)){e=b.getPropertyValue(d);if(e===""&&!c.contains(a.ownerDocument.documentElement,a))e=c.style(a,d)}return e};if(t.documentElement.currentStyle)aa=function(a,b){var d,e,f=a.currentStyle&&a.currentStyle[b],h=a.style;if(!Fa.test(f)&&jb.test(f)){d=h.left;

[rwaldron]

Please provide a reduced test case on  http://jsfiddle.net

[jitter]

this inside an ajax callback is a reference to the ajax settings object. As the documentation states

The beforeSend, error, dataFilter, success and complete options all take callback functions that are invoked at the appropriate times. The this object for all of them will be the object in the context property passed to $.ajax in the settings

Maybe you intended on using the  context option so that this refers to a DOM element not to a plain js object.

contextObject: This object will be made the context of all Ajax-related callbacks. For example specifying a DOM element as the context will make that the context for the complete callback of a request

[anonymous]

for anyone else that finds this page, you need to put your code in a .each ^_

[fco.pacheco@…]

The error is in the function "success": You have to write the id of the element, because when you use "this" you're not referencing $('.delete').

[anonymous]

I received this error message while running a function inside a setTimeout() with "this" as the parameter; setTimeout('UpdateHeight(this);',1000);

Obviously "this" is not available in that scope, so when jquery tried to access it within the function it errored.

[anonymous]

I received it while trying to pas 'this' in an anonymous function within a setInterval. Obviously I should have pased $(this) instead.